METHOD AND APPARATUS FOR VERIFYING SECURITY DOCUMENTS USING WHITE LIGHT INTERFEROMETRY

METHOD AND APPARATUS FOR VERIFYING SECURITY DOCUMENTS USING WHITE LIGHT INTERFEROMETRY

The invention relates to a verification apparatus and a verification method. The verification method comprises the following steps: the security document (13) is oriented relative to a white light interferometer (2), an examination by means of white light interferometry is performed in at least one...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: COBERNUSS, MARTIN, RABELER, UWE, WOLF, ANDREAS
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHECKING-DEVICES
HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING
PHYSICS
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Beschreibung
Zusammenfassung:The invention relates to a verification apparatus and a verification method. The verification method comprises the following steps: the security document (13) is oriented relative to a white light interferometer (2), an examination by means of white light interferometry is performed in at least one location (P1 -P3) on a surface to be examined (15), wherein a depth profile is produced in a direction of examination (19-1 to 19-3), a feature is derived from the depth profile, and the at least one derived feature is compared with one or more specifications in order to derive a verification decision.